FIGURE 6.

PG positively regulates ROP6-mediated gravitropic response. (A) Gravitropic response in the seedlings of Col-0, rop6-2 and rop6^CA. Seedlings of Col-0 and rop6-2 were treated with indicated amounts of PG for 10 h, and then rotated 90° for gravistimulation. The amount of PG that each treatment used was shown on the top. The upper lane shows the gravitropic response in the seedlings of Col-0. The lower lane shows the gravitropic response in the seedlings of rop6-2. rop6^CA was rotated 90° for gravistimulation. (B) Root tropic bending curvatures of Col-0 and rop6-2 at 10 h after re-orientation. (C) Root tropic bending curvatures of Col-0 after re-orientation at intervals of 2 h. (D) Root tropic bending curvatures of rop6-2 after re-orientation at intervals of 2 h. The bar represents the mean and the error bar represents the standard error. The data were calculated from at least three independent experiments. The statistical significance was analyzed by a Student’s t-test and the significant differences (P ≤ 0.05) are indicated by lowercase letters.